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Putting it bluntly

Putting it bluntly

作者:能撒  时间:2019-03-07 08:07:03  人气:

By Jeff Hecht KING George III was right and Benjamin Franklin was wrong, at least when it came to the tips of lightning rods. The American scientist and diplomat believed lightning rods, which he invented in 1749, should have pointed tips, and his design has been used for over two centuries. But tests on a New Mexico mountain top show that blunt lightning rods—which George III decreed be used on royal buildings—are actually more effective at attracting lightning. Electric charge builds up during thunderstorms, and Franklin’s original aim was to prevent lightning by dissipating this charge,